Title: Want more apnea time during Rapid Sequence Intubation? Raise the head of the bed.
题目：在快速序列插管时需要更长窒息时间吗？将床头抬高
Author 作者: Haney Mallemat

The supine position during rapid sequence intubation may result in posterior lung atelectasis thereby reducing lung volumes, oxygenation reserve, and ultimately apnea time.
在快速序列插管时，平卧位所造成的肺后叶的肺不张可导致肺容量和肺氧储备量减低，使窒息时间缩短。
Several studies have shown that elevating the head of the bed by at least 20 degrees or placing a patient in reverse Trendelenberg position (for patients with contra-indications to elevating the head of the bed) during RSI may significantly increase apnea time.
有一些临床研究显示，将床头抬高至少20度或将病人处于反Trendelenburg位（如果不允许将病人头部抬高）可以在快速序列插管时明显延长窒息时间。
Elevating the head of the bed may be especially helpful for patients with BMIs >35
抬高床头尤其会对体质指数（BMI）大于35的病人有效。
References 参考文献：
Weingart, S and Levitan, R. Preoxygenation and prevention of desaturation during emergency airway management. Ann Emerg Med. 2012 Mar; 59(3):165-175.e1; here's the article for FREE可在这里索取免费的文章:http://www.annemergmed.com/article/S0196-0644(11)01667-2/fulltext